Unden may refer to:
* A brand name for
estrone
Estrone (E1), also spelled oestrone, is a steroid, a weak estrogen, and a minor female sex hormone. It is one of three major endogenous estrogens, the others being estradiol and estriol. Estrone, as well as the other estrogens, are synthesized ...
, an estrogen medication
*
Östen Undén
Bo Östen Undén (25 August 1886 – 14 January 1974) was a Swedish academic ( J.D.), civil servant and Social Democratic politician who served as acting Prime Minister of Sweden 6–11 October 1946, following the death of Per Albin Hansson (188 ...
(1886-1974), a Swedish academic and politician
*
Unden Peak (1667 m), a summit in the Rhodope Mountains of Bulgaria named after the Swedish politician
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